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EN 12464-1 — Why These Ranges Exist

EN 12464-1 is the European standard for lighting in indoor workplaces, defining recommended illuminance, glare, uniformity, and colour-rendering targets by task and room type. The ranges throughout this reference are structured the same way — by environment and activity, not a single blanket number.

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Designing to a standard, rather than a rule of thumb, keeps lighting decisions defensible, comparable across projects, and adaptable as a space's use changes.

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